Agriculture - Online Test
Q1. The larvae of urochordates is called
Answer : Option A
Explaination / Solution:
The larvae of urochordates is called tadpole. Tadpolechange into adults by the process of metamorphosis. The structure of tadpole is totally different from the adult ones.
Q2. Select the correct statement.
Answer : Option A
Explaination / Solution:
The roots of extant vascular cryptogams and most monocotyledons do not show any secondary growth; they remain entirely primary throughout their life.
Q3. Which plant hormone is named anti-ageing hormone?
Answer : Option B
Explaination / Solution:
A unique role of cytokinins is to produce anti-aging effects on some plant parts. Cytokinins actually provide a younger, healthier look in plants. By adding this hormone to cut flowers, florists are able to slow down the aging process, providing us with prettier flowers for longer.
Q4. More complex organism cannot give rise to new individuals through regeneration because
Answer : Option A
Explaination / Solution:
Complex multicellular organisms have division of labour and tissues are specialized to perform specific function. In regeneration, new individual regains the lost body parts but higher organism cells are not capable to produce all kind of cells.
Q5. The excess water collected in the form of droplets around special openings of veins near tip of leaves is called as
Answer : Option B
Explaination / Solution:
The excess water collects in the form of droplets around special openings of veins near the tip of grass blades, and leaves of many herbaceous parts. Such water loss in its liquid phaseis known as guttation.
Q6. The coconut water from tender coconut is nothing but
Answer : Option B
Explaination / Solution:
The coconut water from tender coconut is nothing but free nuclear endosperm made up of thousands of nuclei. The surrounding white kernel is the cellular endosperm.
Q7. Entry of ions into cells is called
Answer : Option D
Explaination / Solution:
Entry of ions into cells is called influx. Influx takes place actively against the concentration gradient by utilization of energy through plasmodesmata of plant cells.
Q8. Choose the odd one out among the following: Dryopteris, Pteris, Adiantum, Selaginella.
Answer : Option C
Explaination / Solution:
Selaginella belong to class Lycopsida and other plants (Dryopteris, Pteris, Adiantum) belong to class Pteropsida of Pteridophytes.
Q9.
The excitation of electrons,finally down-hill to causing it to be reduced to is called as
Answer : Option C
Explaination / Solution:
Excitation of electrons, transfer to another accepter, and finally down-hill to causing it to be reduced to is called the Z scheme.
Q10. A somatic cell in human male contains
Answer : Option B
Explaination / Solution:
Somatic cells in human male contain 22 pairs of autosomes and 1 pair (XY) of sex chromosome. Y chromosome is smaller in size and do not have allelomorphic pair of X chromosome. So, only one sex-linked gene is available for each character.
